Nibble springs to mind (look for the very last version updated by Fabrice), but the specialist for disk copies is André. IIRC he often talks about Nibble and BDDisk, but I can't tell you much more on BDDisk.
Both are for Sedoric disks I think.

I suspect many other people around here have excellent knowledge on this subject

Yes sorry haven't used Nibble for a while, I recalled it was one of the best to look inside a disk, but forgot if it had copy habilities.
I suggest you take a look at Sedoric 3 disk, or Sedoric Tools disk (tried to find where it could be downloaded, but failed at finding it... :-/ ), which certainly hold what was, around 1998 at least, the best for Sedoric.

There it is, André sent me a copy of the latest release of Sedoric 3 Tools, when we began working on Sedoric 4.
Apparently he's using COPFORM 2.2 to make disk copies. To find it, select menu "0", then "Cheramy2".